This volume contains the proceedings of the Second International Workshop on Optimal Design and Control, held in Arlington, Virginia, 30 September-3 Octo ber, 1997. The First Workshop was held in Blacksburg, Virginia in 1994. The proceedings of that meeting also appeared in the Birkhauser series on Progress in Systems and Control Theory and may be obtained through Birkhauser. These workshops were sponsored by the Air Force Office of Scientific Re search through the Center for Optimal Design and Control (CODAC) at Vrrginia Tech. The meetings provided a forum for the exchange of new ideas and were designed to bring together diverse viewpoints and to highlight new applications. The primary goal of the workshops was to assess the current status of research and to analyze future directions in optimization based design and control. The present volume contains the technical papers presented at the Second Workshop. More than 65 participants from 6 countries attended the meeting and contributed to its success. It has long been recognized that many modern optimal design problems are best viewed as variational and optimal control problems. Indeed, the famous problem of determining the body of revolution that produces a minimum drag nose shape in hypersonic How was first proposed by Newton in 1686. Optimal control approaches to design can provide theoretical and computational insight into these problems. This volume contains a number of papers which deal with computational aspects of optimal control.

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Optimal Disturbances in Boundary Layers.- MDO - A Mathematical View Point.- Optimization Using Surrogate Objectives on a Helicopter Test Example.- Observations in Adaptive Refinement Strategies for Optimal Design.- The Simplex Gradient and Noisy Optimization Problems.- Adjoint-Based Methods in Aerodynamic Design Optimization.- Semi-Automatic Differentiation.- Robust Reduced-Order Controller of Transitional Boundary Layers.- Modern Optimization Methods for Structural Optimization under Flutter Constraints.- On Shape Optimization and Related Issues.- Using Sensitivities for Flow Analysis.- Sensitivities in Computational Methods for Optimal Flow Control.- Fictitious Domain Approaches in Shape Optimization.- Process Modeling and Optimization: Issues and Challenges.- Automatic Differentiation and Navier-Stokes Computations.- Numerical Computation of Sensitivities and the Adjoint Approach.- Sensor/Actuator Placement via Optimal Distributed Control of Exterior Stokes Flow.- Fast Bounds for Outputs of Partial Differential Equations.- A Comparison of Local and Global Projections in Design Sensitivity Computations.- Gradients, Curvature, and Visual Tracking.- Adjoint Methods for Inverse Free Convection Problems with Application to Solidification Processes.- Shape Differential Equation with a Non Smooth Field.